A satellite-ground integrated global maritime safety information broadcasting system and method

Abstract

The present invention discloses a satellite-ground integrated global maritime safety information broadcasting system and method, which belongs to the field of navigation security technology. The system includes NAVTEX, Inmarsat EGC, AIS / VDES, BeiDou short message service system and shore-based coordination system; the first four systems, as independent broadcasting systems, meet the coverage of all ship types and all sea areas of maritime safety information, and the shore-based coordination system has the functions of source information acquisition, data processing, broadcasting strategy formulation and broadcasting effectiveness evaluation, realizing the classification and priority division of maritime safety information, and further formulating broadcasting strategies and evaluating broadcasting effectiveness on this basis. The present invention can realize the coordinated docking of various broadcasting systems, ensure the autonomous and controllable broadcasting of all ship types and all sea areas of maritime safety information, realize the centralized management, processing and broadcasting of maritime safety information, provide efficient, accurate and reliable maritime safety information, and improve the safety and efficiency of ships' navigation at sea.

Description

Technical Field

[0001] The present invention belongs to the field of navigation security technology, and in particular relates to a satellite-ground integrated global maritime safety information broadcasting system and method. Background Art

[0002] Maritime Safety Information (MSI) is a set of navigational warnings, weather forecasts, alerts, and other safety-related emergency information broadcast to ships. It is a key component of the Global Maritime Distress and Safety System (GMDSS), established by the International Maritime Organization to effectively carry out search and rescue missions and protect life and property at sea. The dissemination of MSI is crucial to the safety of ship navigation and is a key step in ensuring that national maritime authorities fulfill their obligations under international conventions and coastal states. It is directly related to national maritime administration and the safety of ship navigation.

[0003] The current maritime safety information dissemination systems, integrated into the GMDSS, primarily include NAVTEX and Inmarsat EGC. my country has established six English-language NAVTEX broadcast stations and seven Chinese-language NAVTEX broadcast stations, along with an EGC safety network system in Beijing. Through these facilities, my country has initially established a comprehensive maritime safety information dissemination system.

[0004] However, the existing maritime safety information dissemination system has certain limitations. First, it only broadcasts maritime safety information to GMDSS-compliant vessels, preventing vessels without NAVTEX and Inmarsat EGC receivers from receiving it. Second, the NAVTEX system has a limited transmission range. While the Inmarsat EGC system can broadcast globally, its control is controlled by foreign countries, and its use for disseminating maritime safety information must adhere to the principle of "coastal state responsibility." Due to disparities in broadcast infrastructure, some sea areas have coverage gaps, preventing Chinese ships sailing around the world from receiving critical maritime safety information in a timely manner, posing a threat to navigation safety. Third, traditional maritime safety information dissemination is primarily through coastal radio stations, which broadcast information daily to the covered sea area according to a fixed schedule. After the information is broadcast, it is impossible to confirm whether the ship has received the information, requiring multiple repeated broadcasts. This can lead to timeouts when there is a large amount of information and results in a significant waste of broadcast resources. Finally, the current process of disseminating maritime safety information involves a significant amount of manual intervention. For example, after receiving maritime safety information, coastal radio station personnel on duty need to manually verify, classify, and register the information. If there are any questions about the information, they must promptly verify it with the issuing unit. This type of manual intervention not only reduces the efficiency of processing maritime safety information, but also makes it difficult to meet the growing demand for standardized, efficient, and transparent maritime management under new circumstances and requirements. Therefore, disseminating maritime safety information to non-contract-compliant vessels, achieving autonomous and controllable global dissemination of maritime safety information, reducing the waste of maritime safety information dissemination resources, and improving the efficiency of maritime safety information are of extremely important practical significance for improving the level of maritime safety information protection.

[0005] At the same time, with the development of maritime VHF communication technology, navigation safety-related messages in AIS / VDES can be used to broadcast maritime safety information to all ships within a designated target or area. AIS / VDES is mandatory for ships meeting the requirements of the International Maritime Organization. Furthermore, with the integration of my country's BeiDou system into the GMDSS, BeiDou-3 short messages can also assume the responsibility of broadcasting maritime safety information. Overall, to achieve a next-generation maritime safety information broadcast system with full and global coverage, the present invention proposes to construct a core shore-based integrated platform that interconnects with relevant departments to obtain accurate maritime safety information, further formulate appropriate broadcast strategies based on real-time conditions, and follow a designed broadcast process, thereby improving my country's maritime safety information security level. In view of this, the present invention proposes a satellite-ground integrated global maritime safety information broadcast system, intended to serve as an upgrade to the existing maritime safety information broadcast system, achieve full and global coverage of maritime safety information broadcast, improve the efficiency and effectiveness of maritime safety information broadcast, and reduce the waste of broadcast resources. Summary of the Invention

[0006] To address the aforementioned issues in the broadcasting of maritime safety information, the present invention proposes a satellite-ground integrated global maritime safety information broadcasting system and method. By adding a shore-based coordination system, the authenticated maritime safety information broadcasting tasks issued by the competent authorities are obtained, and its different functional modules are used to implement the analysis and broadcasting strategy formulation of maritime safety information. Ultimately, the information is broadcast through independent broadcasting systems connected to the shore-based coordination system, and real-time monitoring and effectiveness evaluation of the broadcasting effect are achieved. The present invention can better meet the safety needs of ships during maritime navigation, provide accurate, timely, and reliable maritime safety information, and provide stronger support for the safe navigation of ships and the safety of personnel working at sea.

[0007] To achieve the above-mentioned objectives, the present invention provides, in a first aspect, a satellite-ground integrated global maritime safety information broadcasting system, comprising a shore-based coordination system and a plurality of independent broadcasting systems connected to the shore-based coordination system;

[0008] The shore-based coordination system includes a data receiving module, a data processing module, a broadcast strategy formulation module, an external interface module and a validity evaluation module;

[0009] The data receiving module receives maritime safety information data from the competent authorities through a dedicated network based on an encrypted transmission protocol and performs parsing processing to obtain the specific content of the maritime safety information, including information source, information number, specific service content, service coverage time and service application area, etc. The heterogeneous format of the maritime safety information data is converted into a unified structured data format to ensure the digital flow of the maritime safety information data between the various modules of the shore-based coordination system, thereby improving the processing speed of the maritime safety information;

[0010] The data processing module classifies maritime safety information into three categories: meteorological, navigation warning, or search and rescue, based on the information source analyzed by the data receiving module. For each category of maritime safety information, the data processing module assigns different priorities based on the specific business content analyzed by the data receiving module. The priorities are ranked from high to low as extremely important, important, and routine. Information with high priority requires an immediate response, while information with low priority can be responded to normally. Extremely important messages have absolute priority over other information. The setting of maritime safety information priorities facilitates the formulation of subsequent broadcast strategies, thereby maximizing the utilization and allocation of broadcast resources and ensuring that key information can be fully conveyed.

[0011] The broadcast strategy formulation module is used to formulate a broadcast strategy to determine the broadcast system, broadcast frequency and broadcast duration of maritime safety information; the broadcast system includes NAVTEX, Inmarsat EGC, AIS / VDES and BeiDou-3 short message system, using AIS / VDES to broadcast maritime safety information to ships within a broadcast area less than 50 nautical miles from the coast, using NAVTEX to broadcast maritime safety information to ships within a broadcast area of 50 to 400 nautical miles (inclusive) from the coast, and using Inmarsat EGC and BeiDou-3 short message system to broadcast maritime safety information to ships in the global waters with a broadcast area greater than 400 nautical miles from the coast;

[0012] The broadcast frequency is determined according to the priority classification result of the maritime safety information by the data processing module; specifically, for maritime safety information of extremely important priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately; if the frequency is occupied, the ongoing transmission will be interrupted, and the broadcast will be immediately carried out when the frequency is idle. After the broadcast of the extremely important information is completed, the original broadcast work will resume normal broadcasting; maritime safety information of extremely important priority needs to be broadcast once every 1 to 2 hours; for maritime safety information of important priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately; if the frequency is occupied, it will be broadcast after the current broadcast is completed; maritime safety information of important priority needs to be broadcast once every 2 to 4 hours; maritime safety information of normal priority will be broadcast within the specified broadcast time according to the broadcast schedule;

[0013] The broadcasting duration is determined according to the service coverage time analyzed by the data receiving module, and the broadcast is maintained within the service coverage time range of the maritime safety information;

[0014] The external interface module is connected to the broadcast strategy formulation module and each broadcast system. The external interface module selects the corresponding broadcast system for broadcasting according to the formulated broadcast strategy. At the same time, after receiving the maritime safety information, ships within the broadcast area feedback to the corresponding broadcast system, and each broadcast system then uniformly feeds back to the external interface module.

[0015] The effectiveness evaluation module is connected to the external interface module, and performs an effectiveness evaluation on the broadcast effect of maritime safety information based on the broadcast feedback data transmitted by the external interface module. The effectiveness evaluation includes the broadcast coverage and the timeliness of the broadcast, so as to evaluate whether the formulated broadcast strategy meets the needs of ship-side users.

[0016] Furthermore, the data source formats of maritime safety information include email, official fax or real-time voice, and the data receiving module uses natural language processing and semantic understanding algorithms to parse data in text formats such as email and official fax, and uses voice signal processing and semantic understanding algorithms to parse data in voice format; the maritime safety information received through the dedicated network is authenticated and reviewed.

[0017] Furthermore, the meteorological information is further divided into two categories according to the specific business content analyzed, namely, weather forecast and weather warning. When the specific business content is daily weather forecast, it is weather forecast information; when the specific business content is meteorological disaster, it is weather warning information. The weather forecast information is classified as normal priority. For weather warning information, when the meteorological disaster level is blue warning, it is classified as normal priority. When the meteorological disaster level is orange warning or above and the business area is close to a densely populated area of ships, it is classified as extremely important priority. The rest are important priorities. The meteorological disasters include but are not limited to storm surges, wave disasters, sea ice disasters, sea fog disasters, tsunamis, etc.

[0018] For navigation warning information, when its specific business content involves requiring ships to take emergency actions such as immediate avoidance or detour, it is classified as extremely important priority, and other navigation warning information is classified as important priority;

[0019] For search and rescue information, when its specific business content involves an emergency situation involving human life safety, it is classified as extremely important priority, and the rest of the search and rescue information is classified as important priority.

[0020] Furthermore, the broadcast area is determined based on the parsed business application area of the maritime safety information and the priority classification result of the maritime safety information; specifically, for maritime safety information of normal priority, the parsed business application area is deemed as the broadcast area; for maritime safety information of important priority, the broadcast area is set to a range of 3 to 5 nautical miles outward from the business application area; for maritime safety information of extremely important priority, the broadcast area is set to a range of 6 to 8 nautical miles outward from the business application area.

[0021] Furthermore, the shore-based coordination system also includes a comprehensive visualization module, which displays the broadcast status of maritime safety information in real time. Its data sources include the broadcast strategy of the broadcast strategy formulation module and the broadcast effectiveness evaluation results of the effectiveness evaluation module, covering information that has been broadcast, information that is being broadcast, and information that is planned to be broadcast, thereby realizing the summary display of information.

[0022] Furthermore, the comprehensive visualization module is based on electronic nautical chart technology and the S-100 data model of the XML encoding standard to display various types of maritime safety information on the nautical chart, so that shore-based management users can intuitively understand the geographical location and coverage of the information. The map supports functions such as zooming and dragging to meet users' viewing needs for different areas; the comprehensive visualization module provides real-time statistics and summary display functions for broadcast results. Shore-based management users can evaluate the broadcast effect by viewing indicators such as the broadcast success rate, broadcast time, and broadcast effectiveness of different information; for high-priority maritime safety information, the comprehensive visualization module sets an alarm or reminder function in the system to ensure that shore-based management users pay attention to such maritime safety information in a timely manner to deal with possible subsequent operations.

[0023] It should be noted that during the flow of maritime safety information, the shore-based coordination system must strictly abide by the principles of data security and privacy protection to ensure that information is not leaked or abused. In addition, the shore-based coordination system needs to have strong data processing and storage capabilities, and be able to efficiently process large amounts of maritime safety information data in parallel and store it for a long time.

[0024] A second aspect of the present invention provides a satellite-ground integrated global maritime safety information broadcasting method, comprising the following steps:

[0025] Step 1: Receive maritime safety information data from the competent authorities and parse out information such as the source, number, service content, service coverage period, and service area, converting the heterogeneous maritime safety information data into a unified structured data format;

[0026] Step 2: Based on the information source analyzed in Step 1, the maritime safety information is classified into three categories: meteorological, navigation warning, or search and rescue. For each category of maritime safety information, different priorities are assigned based on the specific business content analyzed in Step 1, with the priorities being extremely important, important, and routine.

[0027] Step 3: Based on the priority classification results and the parsed information, a broadcast strategy is formulated. The broadcast strategy includes the broadcast system, broadcast frequency, and broadcast duration. Specifically, AIS / VDES is used to broadcast maritime safety information to ships within a broadcast area of less than 50 nautical miles from the coast. NAVTEX is used to broadcast maritime safety information to ships within a broadcast area of 50 to 400 nautical miles (inclusive) from the coast. Inmarsat EGC and BeiDou-3 short message systems are used to broadcast maritime safety information to ships in the global waters with a broadcast area greater than 400 nautical miles from the coast.

[0028] The broadcast frequency is determined based on the priority classification result of the maritime safety information obtained in step 2. Specifically, for maritime safety information of extremely important priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately. If the frequency is occupied, the ongoing transmission will be interrupted and the broadcast will be resumed immediately when the frequency is idle. After the broadcast of the extremely important information is completed, the original broadcast work will resume normal broadcasting. Maritime safety information of extremely important priority needs to be broadcast once every 1 to 2 hours. For maritime safety information of important priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately. If the frequency is occupied, it will be broadcast after the current broadcast is completed. Maritime safety information of important priority needs to be broadcast once every 2 to 4 hours. Maritime safety information of normal priority will be broadcast according to the broadcast schedule and within the specified broadcast time.

[0029] The broadcast duration is determined based on the service coverage time parsed in step 1, and the broadcast is maintained within the service coverage time of the maritime safety information.

[0030] Step 4: The broadcast strategy formulated in step 3 is transmitted to the corresponding broadcast system for broadcasting; after receiving the maritime safety information, the ships in the broadcast area feedback the receipt to the corresponding broadcast system;

[0031] Step 5: Collect the broadcast feedback data received by the broadcast system and conduct an effectiveness evaluation on the broadcast effect of maritime safety information. The effectiveness evaluation includes the broadcast coverage and timeliness of the broadcast.

[0032] Furthermore, in step 1, the data source format of the maritime safety information includes email, official fax or real-time voice, among which the data in text format such as email and official fax is parsed using natural language processing and semantic understanding algorithms, and the data in voice format is parsed using voice signal processing and semantic understanding algorithms.

[0033] Furthermore, in step 2, meteorological information is further divided into two categories, meteorological forecast and meteorological warning, based on the specific business content parsed in step 1. When the specific business content is daily weather forecast, it is meteorological forecast information; when the specific business content is meteorological disaster, it is meteorological warning information. The meteorological forecast information is classified as conventional priority. For meteorological warning information, when the meteorological disaster level is blue warning, it is classified as conventional priority. When the meteorological disaster level is orange warning or above and the business area is close to a densely populated area of ships, it is classified as extremely important. The rest are important priorities. The meteorological disasters include but are not limited to storm surges, wave disasters, sea ice disasters, sea fog disasters, tsunamis, etc.

[0034] For navigation warning information, when its specific business content involves requiring ships to take emergency actions such as immediate avoidance or detour, it is classified as extremely important priority, and other navigation warning information is classified as important priority;

[0035] For search and rescue information, when its specific business content involves an emergency situation involving human life safety, it is classified as extremely important priority, and the rest of the search and rescue information is classified as important priority.

[0036] Furthermore, the broadcast area is determined based on the business application area of the maritime safety information parsed in step 1 and the priority classification result of the maritime safety information in step 2. Specifically, for maritime safety information of normal priority, the parsed business application area is deemed to be the broadcast area; for maritime safety information of important priority, the broadcast area is set to a range of 3 to 5 nautical miles outward from the business application area; for maritime safety information of extremely important priority, the broadcast area is set to a range of 6 to 8 nautical miles outward from the business application area.

[0037] The beneficial effects of the present invention are:

[0038] 1) The present invention provides a satellite-ground integrated global maritime safety information broadcast system, adding two broadcast systems: AIS / VDES and the BeiDou-3 short message system. This system covers ships not equipped with NAVTEX and Inmarsat EGC receivers, ensuring the global, autonomous, and controllable broadcast of maritime safety information. By adding a shore-based coordination system, comprehensive coordination and docking of the individual broadcast systems and the digital transfer of maritime safety information are achieved. This system achieves global coverage and broadcast of maritime safety information, coordinated business management, and efficient data processing without human intervention, thereby improving the efficiency and reliability of maritime safety information broadcasting.

[0039] 2) The present invention provides a method for designing a satellite-ground integrated global maritime safety information prioritization and dissemination process. Through prioritization and dissemination process design, it can achieve immediate response, integrated processing, and effective dissemination of maritime safety information, thereby improving the effectiveness and accuracy of maritime safety information dissemination.

[0040] 3) The satellite-ground integrated global maritime safety information broadcasting system provided by the present invention helps to improve the application level and efficiency of maritime management, provide more effective, accurate, reliable and efficient maritime safety information services for global maritime navigation, and enhance the global safety assurance capabilities of ships at sea. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a structural block diagram of the satellite-ground integrated global maritime safety information broadcasting system of the present invention.

[0042] Figure 2 This is a structural block diagram of the shore-based coordination system in the satellite-ground integrated global maritime safety information broadcasting system of the present invention.

[0043] Figure 3This is the flow chart for broadcasting regular priority meteorological maritime safety information.

[0044] Figure 4 Flowchart for broadcasting important priority navigation warning type maritime safety information.

[0045] Figure 5 Flowchart for broadcasting extremely important priority search and rescue maritime safety information. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings.

[0047] The present invention provides a satellite-ground integrated global maritime safety information broadcasting system, the structural block diagram of which is as follows: Figure 1 As shown in the figure, it includes NAVTEX, Inmarsat EGC, BeiDou-3 short message system, AIS / VDES and shore-based coordination system. Among them, NAVTEX, Inmarsat EGC, BeiDou-3 short message system and AIS / VDES are independent broadcasting systems connected to the shore-based coordination system respectively. The shore-based coordination system is the core of the satellite-ground integrated global maritime safety information broadcasting system and the centralized management and processing center of maritime safety information.

[0048] Each independent broadcast system has different operating frequencies and coverage areas, as shown in Table 1. AIS / VDES broadcasts maritime safety information to ships within 50 nautical miles of the coast. The AIS / VDES system is less susceptible to interference from external natural factors and can play a unique role in ship collision avoidance, maritime search and rescue, and maritime investigations. The NAVTEX system broadcasts maritime safety information to ships within 50 to 400 nautical miles of the coast. For ships beyond 400 nautical miles from the coast, Inmarsat EGC and the BeiDou-3 short message system broadcast maritime safety information to ships. The BeiDou-3 short message system is a Chinese-developed, controllable system, ensuring data security.

[0049] Table 1 Operating frequency and coverage of broadcast system

[0050]

[0051] The shore-based coordination system is the core of the satellite-ground integrated global maritime safety information dissemination system. It has the functions of source information acquisition, data processing, dissemination strategy formulation and dissemination effectiveness evaluation. It is responsible for managing maritime safety information and coordinating the independent dissemination systems. At the same time, the shore-based coordination system should at least adopt the form of dual-machine hot standby to ensure the security and reliability of maritime safety information data to the greatest extent. The system block diagram is as follows Figure 2The shore-based coordination system consists of a data receiving module, a data processing module, a broadcast strategy formulation module, an external interface module, a validity evaluation module, and a comprehensive visualization module.

[0052] Example 1: The satellite-ground integrated maritime safety information broadcasting system of the present invention is used to broadcast conventional priority meteorological maritime safety information. The broadcasting process is as follows: Figure 3 The weather forecast is as follows: 250303006, 10:41 AM, March 3, 2025: A blue warning signal for high winds at sea was issued: Northeast winds of Force 6, gusting to Force 7 to 8, are expected along the coast of Dalian from the afternoon to the evening of the 3rd. Relevant departments are requested to take precautions against high winds and pay attention to maritime traffic and operational safety.

[0053] First, the shore-based coordination system's data receiving module receives maritime safety information sent from the meteorological department via a dedicated network using the HTTPS protocol. It parses the information source as the Dalian Meteorological Observatory, identifies the information number as 250303006, and identifies the specific service content as a blue alert for gale at sea. The service coverage period is from 13:00 to 18:00 on March 3, 2025, and the service area is the coastal area of Dalian. The source information data is then converted into structured data to ensure data flow between the various modules of the shore-based coordination system. The format-converted data is then transferred to the data processing module. Based on the parsed information source, the data processing module determines that the maritime safety information is meteorological information, and classifies the meteorological information into a regular priority based on the parsed specific service content, a blue alert for gale at sea. The broadcast strategy formulation module then formulates a broadcast strategy based on the maritime safety information priority classification results and the parsed information. For regular-priority meteorological maritime safety information, the broadcast area is first set to the service area. This information is broadcasted along the coast of Dalian, typically within 50 nautical miles of the coast, using AIS / VDES. The broadcast duration is from 13:00 to 18:00 on March 3, 2025. A determination is made as to whether the current time is within the specified broadcast time. If not, the information is then waited until the specified broadcast time. If it is, the information is transcoded to match the selected broadcast system and broadcast according to the established broadcast strategy. Upon receiving the information, ships within the broadcast area also use AIS / VDES to report receipt to the broadcast station. The external interface module then feeds the broadcast results back to the effectiveness evaluation module, which then evaluates the effectiveness of the broadcast. These two actions are post-broadcast actions and do not affect the timeliness of the broadcast. Finally, the entire broadcasting process is tracked and displayed by the integrated visualization module, which displays the broadcasting status and related information of maritime safety information in real time. Its data sources include the broadcasting strategy of the broadcasting strategy formulation module and the broadcasting effectiveness evaluation results of the effectiveness evaluation module, making it easier for shore-based management personnel to grasp the real-time status of the broadcasting business.

[0054] Example 2: The satellite-ground integrated maritime safety information broadcasting system of the present invention is used to broadcast important priority navigation warning information. The broadcasting process is as follows: Figure 4 The navigation warning is as follows: Tianjin Navigation Police 13 / 25 Tianjin Port: From now until May 31, 2024, the vessels "Tianjing", "Tianlin", "Shunxing 99" and "Jinyou 19" will be conducting terminal construction work at the West Port Basin of Dalian Port.

[0055] First, the shore-based coordination system's data receiving module receives maritime safety information sent from the maritime administration via a dedicated network using the HTTPS protocol. It parses the information and identifies it as originating from the Tianjin Maritime Safety Administration (TMA), with the message number 13 / 25 and the specific business context as terminal construction operations. The service coverage period is from May 11, 2024 (the date the information is received) to May 31, 2024, and the service area is from 38°59'08"N, 122°02'00"E to 38°53'00"N, 121°41'00"E. The module then converts the source information into structured data to ensure data flow between the various modules of the shore-based coordination system. The converted data is then transferred to the data processing module. Based on the parsed information source, the module identifies the maritime safety information as a navigation warning and prioritizes it based on the parsed business context of terminal construction operations. The broadcast strategy formulation module then formulates a broadcast strategy based on the prioritized maritime safety information and the parsed information. For high-priority navigational warning maritime safety information, the broadcast area is set to extend 3 to 5 nautical miles beyond the service area. This information is broadcasted approximately 9 to 11 nautical miles from the coast, so AIS / VDES is used for broadcast. The broadcast period is from May 11, 2024, to May 31, 2024. The system checks whether the selected broadcast system's frequency is available. If the current frequency is occupied, the system waits until the current broadcast completes before broadcasting again. If the current frequency is available, the navigational warning information is transcoded to match the selected broadcast system and broadcast according to the established broadcast strategy. Upon receiving the maritime safety information, ships within the broadcast area also use AIS / VDES to report receipt to the broadcast station. The external interface module then transmits the broadcast results to the effectiveness evaluation module, which then evaluates the effectiveness of the broadcast. These two actions are post-broadcast actions and do not affect the timeliness of the broadcast. Finally, the entire broadcasting process is tracked and displayed by the integrated visualization module, which displays the broadcasting status and related information of maritime safety information in real time. Its data sources include the broadcasting strategy of the broadcasting strategy formulation module and the broadcasting effectiveness evaluation results of the effectiveness evaluation module, making it easier for shore-based management personnel to grasp the real-time status of the broadcasting business.

[0056] Example 3: The satellite-ground integrated maritime safety information broadcasting system of the present invention is used to broadcast extremely important priority search and rescue maritime safety information. The broadcasting process is as follows: Figure 5The search and rescue information is as follows: NAVAREA XV 231 / 14, San Ambrosio & San Felix, Chile. Four speedboats carrying 20 pirates armed with automatic weapons attacked a fishing boat. The pirates have left, leaving a number of seafarers injured and in urgent need of help.

[0057] First, the shore-based coordination system's data receiving module receives maritime safety information sent from the search and rescue center via a dedicated network using the HTTPS protocol. It parses the information and determines that the source is the Chilean Search and Rescue Coordination Center, the message number is 231 / 14, and the specific business content is: Four speedboats carrying 20 pirates armed with automatic weapons attacked a fishing boat, the pirates have left, leaving a number of seafarers injured and in urgent need of help. This information does not include the service coverage time, and the service area is San Ambrosio and San Felix. The source information data is then converted into structured data to ensure data flow between the various modules of the shore-based coordination system. The converted data is then transferred to the data processing module. Based on the parsed source of the information, the data processing module determines that the maritime safety information is search and rescue information. Based on the parsed business content, Four speedboats carrying 20 pirates armed with automatic weapons attacked a fishing boat, the pirates have left, leaving a number of seafarers injured and in urgent need of help, this search and rescue information is classified as extremely important. The broadcast strategy development module then formulates a broadcast strategy based on the results of the maritime safety information prioritization and the parsed information. For extremely important search and rescue maritime safety information, the broadcast area is first set to extend 6 to 8 nautical miles outward from the service area. Since this information is broadcast more than 500 nautical miles from the coast, it is broadcast using Inmarsat EGC and BeiDou-3 short messages. Since this information does not specify a broadcast duration, it is set to be broadcast every two hours for 24 hours. The module then determines whether the selected broadcast system's frequency is idle. If the current frequency is occupied, the ongoing transmission is interrupted and the information is broadcast immediately when the frequency becomes idle. If the current frequency is idle, the search and rescue information is transcoded to match the selected broadcast system and broadcast according to the established broadcast strategy. After receiving the maritime safety information, ships in the broadcast area also use Inmarsat EGC or BeiDou-3 short messages to feedback the reception to the broadcast station, and the external interface module feeds back the broadcast results to the effectiveness evaluation module, which then evaluates the effectiveness of this broadcast. These two items are subsequent actions after the broadcast and do not affect the timeliness of this broadcast.Finally, the entire broadcasting process is tracked and displayed by the integrated visualization module, which displays the broadcasting status and related information of maritime safety information in real time. Its data sources include the broadcasting strategy of the broadcasting strategy formulation module and the broadcasting effectiveness evaluation results of the effectiveness evaluation module, making it easier for shore-based management personnel to grasp the real-time status of the broadcasting business.

[0058] The present invention provides an objective and scientific satellite-ground integrated global maritime safety information broadcasting system and method. Through a systematic framework design, it ensures the autonomous and controllable broadcasting of maritime safety information covering all ship types and all sea areas, realizes the centralized management, efficient processing and effective broadcasting of maritime safety information, and improves the broadcasting efficiency, reliability and accuracy of maritime safety information through method process design, thereby enhancing the global safety assurance capability of ships' maritime navigation.

[0059] Finally, it should be noted that the above embodiments are intended to illustrate the technical solutions of the present invention and do not constitute any form of limitation of the present invention. Those skilled in the art should fully understand that it is entirely feasible to modify the technical solutions described in the above embodiments or to replace any or all of the technical features with equivalents. Such modifications or replacements, as long as they do not deviate from the scope of protection defined by the claims of the present invention, should be considered reasonable extensions of the present invention.

Claims

1. A satellite-ground integrated global maritime safety information broadcasting system, characterized in that: Including shore-based coordination system and several independent broadcasting systems connected with the shore-based coordination system; The shore-based coordination system includes a data receiving module, a data processing module, a broadcast strategy formulation module, an external interface module and a validity evaluation module; The data receiving module receives maritime safety information data from the competent authorities through a dedicated network based on an encrypted transmission protocol and performs parsing processing to obtain the specific content of the maritime safety information, including the source of the information, the information number, the specific service content, the service coverage time and the service application area, and converts the maritime safety information data in heterogeneous formats into a unified structured data format; The data processing module classifies the maritime safety information into three categories: meteorological, navigation warning, or search and rescue, based on the information source analyzed by the data receiving module. For each category of maritime safety information, the data processing module assigns different priorities to the maritime safety information based on the specific business content analyzed by the data receiving module, with the priorities being extremely important, important, and routine, from high to low. The broadcast strategy formulation module is used to formulate a broadcast strategy to determine the broadcast system, broadcast frequency and broadcast duration of maritime safety information; the broadcast system includes NAVTEX, Inmarsat EGC, AIS / VDES and BeiDou-3 short message system, using AIS / VDES to broadcast maritime safety information to ships within a broadcast area less than 50 nautical miles from the coast, using NAVTEX to broadcast maritime safety information to ships within a broadcast area of 50 to 400 nautical miles from the coast, and using Inmarsat EGC and BeiDou-3 short message system to broadcast maritime safety information to ships in the global waters with a broadcast area greater than 400 nautical miles from the coast; The broadcast frequency is determined according to the priority classification result of the maritime safety information by the data processing module: for maritime safety information of extremely important priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately; if the frequency is occupied, the ongoing transmission will be interrupted, and the frequency will be idle and broadcast immediately. After the broadcast of extremely important information is completed, the original broadcast work will resume normal broadcasting; maritime safety information of extremely important priority will be broadcast once every 1 to 2 hours; for maritime safety information of important priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately; if the frequency is occupied, it will be broadcast after the current broadcast is completed; maritime safety information of important priority will be broadcast once every 2 to 4 hours; maritime safety information of normal priority will be broadcast according to the broadcast schedule and within the specified broadcast time; The broadcasting duration is determined according to the service coverage time analyzed by the data receiving module, and the broadcast is maintained within the service coverage time range of the maritime safety information; The external interface module is connected to the broadcast strategy formulation module and each broadcast system. The external interface module selects the corresponding broadcast system for broadcasting according to the formulated broadcast strategy. At the same time, after receiving the maritime safety information, ships within the broadcast area feedback to the corresponding broadcast system, and each broadcast system then uniformly feeds back to the external interface module. The effectiveness evaluation module is connected to the external interface module, and performs an effectiveness evaluation on the broadcast effect of maritime safety information based on the broadcast feedback data transmitted by the external interface module. The effectiveness evaluation includes the broadcast coverage and the timeliness of the broadcast, so as to evaluate whether the formulated broadcast strategy meets the needs of ship-side users.

2. The satellite-ground integrated global maritime safety information broadcasting system according to claim 1, characterized in that: The data receiving module uses natural language processing and semantic understanding algorithms to parse data in text format, and uses voice signal processing and semantic understanding algorithms to parse data in voice format.

3. The satellite-ground integrated global maritime safety information broadcasting system according to claim 1, characterized in that: The meteorological information is divided into two categories according to the specific business content analyzed: weather forecast and weather warning. When the specific business content is daily weather forecast, it is weather forecast information; when the specific business content is meteorological disaster, it is weather warning information. The weather forecast information is classified as normal priority. For weather warning information, when the meteorological disaster level is blue warning, it is classified as normal priority. When the meteorological disaster level is orange warning or above and the business area is close to a densely populated area of ships, it is classified as extremely important priority. The rest are important priorities. The meteorological disasters include storm surges, wave disasters, sea ice disasters, sea fog disasters, and tsunamis. For navigation warning information, when its specific business content involves requiring the ship to take immediate emergency action, it is classified as extremely important priority, and the rest of the navigation warning information is classified as important priority; For search and rescue information, when its specific business content involves an emergency situation involving human life safety, it is classified as extremely important priority, and the rest of the search and rescue information is classified as important priority.

4. The satellite-ground integrated global maritime safety information broadcasting system according to claim 1, characterized in that: The broadcast area is determined based on the parsed business application area of the maritime safety information and the priority classification results of the maritime safety information. Specifically, for maritime safety information of normal priority, the broadcast area is the parsed business application area; for maritime safety information of important priority, the broadcast area is a range of 3 to 5 nautical miles outward from the business application area; for maritime safety information of extremely important priority, the broadcast area is a range of 6 to 8 nautical miles outward from the business application area.

5. The satellite-ground integrated global maritime safety information broadcasting system according to claim 1, characterized in that: The shore-based coordination system also includes a comprehensive visualization module, which displays the broadcast status of maritime safety information in real time. Its data sources include the broadcast strategy of the broadcast strategy formulation module and the broadcast effectiveness evaluation results of the effectiveness evaluation module, covering information that has been broadcast, information that is being broadcast, and information planned to be broadcast, thereby realizing the summary display of information.

6. The satellite-ground integrated global maritime safety information broadcasting system according to claim 5, characterized in that: The comprehensive visualization module is based on electronic nautical chart technology and the S-100 data model of the XML encoding standard, and displays various types of maritime safety information on the nautical chart. The map supports zooming and dragging to meet users' viewing needs for different areas; the comprehensive visualization module provides real-time statistics and summary display functions for broadcast results. Shore-based management users can evaluate the broadcast effect by viewing the broadcast success rate, broadcast time, and broadcast effectiveness indicators of different information.

7. A method for broadcasting global maritime safety information using the satellite-ground integrated global maritime safety information broadcasting system of claim 1, characterized in that: The following steps are involved: Step 1: Receive maritime safety information data from the competent authorities and parse out information such as the source, number, service content, service coverage period, and service area, converting the heterogeneous maritime safety information data into a unified structured data format; Step 2: Based on the information source analyzed in Step 1, the maritime safety information is classified into three categories: meteorological, navigation warning, or search and rescue. For each category of maritime safety information, different priorities are assigned based on the specific business content analyzed in Step 1, with the priorities being extremely important, important, and routine. Step 3: Based on the priority classification results and the parsed information, a broadcast strategy is formulated. The broadcast strategy includes the broadcast system, broadcast frequency, and broadcast duration. Specifically, AIS / VDES is used to broadcast maritime safety information to ships within a broadcast area of less than 50 nautical miles from the coast, NAVTEX is used to broadcast maritime safety information to ships within a broadcast area of 50-400 nautical miles from the coast, and Inmarsat EGC and BeiDou-3 short message systems are used to broadcast maritime safety information to ships in the global waters within a broadcast area of more than 400 nautical miles from the coast. The broadcast frequency is determined based on the priority classification result of the maritime safety information obtained in step 2: For maritime safety information of extremely important priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately; if the frequency is occupied, the ongoing transmission will be interrupted, and the broadcast will be immediately carried out when the frequency is idle. After the broadcast of the extremely important information is completed, the original broadcast work will resume normal broadcasting; maritime safety information of extremely important priority will be broadcast once every 1 to 2 hours; for maritime safety information of important priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately; if the frequency is occupied, it will be broadcast after the current broadcast is completed; maritime safety information of important priority will be broadcast once every 2 to 4 hours; maritime safety information of normal priority will be broadcast according to the broadcast schedule and within the specified broadcast time; The broadcast duration is determined based on the service coverage time parsed in step 1, and the broadcast is maintained within the service coverage time of the maritime safety information. Step 4: The broadcast strategy formulated in step 3 is transmitted to the corresponding broadcast system for broadcasting; after receiving the maritime safety information, the ships in the broadcast area feedback the receipt to the corresponding broadcast system; Step 5: Collect the broadcast feedback data received by the broadcast system and conduct an effectiveness evaluation on the broadcast effect of maritime safety information. The effectiveness evaluation includes the broadcast coverage and timeliness of the broadcast.

8. The satellite-ground integrated global maritime safety information broadcasting method according to claim 7, characterized in that: In the step 1, the data in text format is parsed using natural language processing and semantic understanding algorithms, and the data in voice format is parsed using voice signal processing and semantic understanding algorithms.

9. The satellite-ground integrated global maritime safety information broadcasting method according to claim 7, characterized in that: In step 2, meteorological information is divided into two categories: weather forecast and weather warning based on the specific business content parsed in step 1. When the specific business content is daily weather forecast, it is weather forecast information; when the specific business content is meteorological disaster, it is weather warning information. The weather forecast information is classified as normal priority. For weather warning information, when the meteorological disaster level is blue warning, it is classified as normal priority. When the meteorological disaster level is orange warning or above and the business area is close to a densely populated area of ships, it is classified as extremely important. The rest are important priorities. The meteorological disasters include storm surges, wave disasters, sea ice disasters, sea fog disasters, and tsunamis. For navigation warning information, when its specific business content involves requiring the ship to take immediate emergency action, it is classified as extremely important priority, and the rest of the navigation warning information is classified as important priority; For search and rescue information, when its specific business content involves an emergency situation involving human life safety, it is classified as extremely important priority, and the rest of the search and rescue information is classified as important priority.

10. The satellite-ground integrated global maritime safety information broadcasting method according to claim 7, characterized in that: For maritime safety information of normal priority, the broadcast area is the parsed business area; for maritime safety information of important priority, the broadcast area is 3 to 5 nautical miles outward from the business area; for maritime safety information of extremely important priority, the broadcast area is 6 to 8 nautical miles outward from the business area.

Images